The actress has taken on the part of Scarlett singing Brigitte's original lines in English, while Serge's part is sung in French by his son, Lulu Gainsbourg.
Think lots of breathy vocals and old Hollywood styling from Ms Johansson - a whole world away from that skintight Avengers catsuit. (More along the lines of her uber-glam Dolce adverts.)
What do you think: should Scarlett scrap the singing and stick to the day job? Or is she giving Gwyneth Paltrow a run for her money as the latest actress-turned-songstress? Let us know in a comment below.
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